-er a-a a-b a-c a-t aaa aab aac aae aaf aar aas aat ab- aba abb abc abe abf abr abs abt ac- aca acb acc ace acf acr acs act aea aeb aec aee aef aer aes aet af- afa afb afc afe aff afr afs aft ar- ara arb arc are arf arr ars art as- asa asb asc ase asf asr ass ast at- ata atb atc ate atf atr ats att baa bab bac bae baf bar bas bat bba bbb bbc bbe bbf bbr bbs bbt bca bcb bcc bce bcf bcr bcs bct be- bea beb bec bee bef ber bes bet bfa bfb bfc bfe bff bfr bfs bft bra brb bre brf brr brs brt bsa bsb bsc bse bsf bsr bss bst bta btb btc bte btf btr bts btt c-- caa cab cac cae caf car cas cat cba cbb cbc cbe cbf cbr cbs cbt cca ccb ccc cce ccf ccr ccs cct ce- cea ceb cec cee cef cer ces cet cfa cfb cfc cfe cff cfr cfs cft cra crb crc cre crf crr crs crt csa csb csc cse csf csr css cst cta ctb ctc cte ctf ctr cts ctt eaa eab eac eae eaf ear eas eat eba ebb ebc ebe ebf ebr ebs ebt ec- eca ecb ecc ece ecf ecr ecs ect eea eeb eec eee eef eer ees eet ef- efa efb efc efe eff efr efs eft era erb erc ere erf err ers ert es- esa esb esc ese esf esr ess est eta etb etc ete etf etr ets ett faa fab fac fae faf far fas fat fba fbb fbc fbe fbf fbr fbs fbt fca fcb fcc fce fcf fcr fcs fct fea feb fec fee fef fer fes fet ffa ffc ffe fff ffr ffs fft fra frb frc fre frf frr frs frt fsa fsb fsc fse fsf fsr fss fst fta ftb ftc fte ftf ftr fts ftt ra- raa rab rac rae raf rar ras rat rba rbb rbc rbe rbf rbr rbs rbt rca rcb rcc rce rcf rcr rcs rct re- rea reb rec ree ref rer res ret rfa rfb rfc rfe rff rfr rfs rft rra rrb rrc rrf rrr rrs rrt rsa rsb rsc rse rsf rsr rss rst rta rtb rtc rte rtf rtr rts rtt saa sab sac sae saf sar sas sat sba sbb sbc sbe sbf sbr sbs sbt sca scb scc sce scf scr scs sct se- sea seb sec see sef ser ses set sfa sfb sfc sfe sff sfr sfs sft sr- sra srb src sre srf srr srs srt ss- ssa ssb ssc sse ssf ssr sss sst sta stb stc ste stf str sts stt taa tab tac tae taf tar tas tat tba tbb tbc tbe tbf tbr tbs tbt tca tcb tcc tce tcf tcr tcs tct te- tea teb tec tee tef ter tes tet tfa tfb tfc tfe tff tfr tfs tft tra trb trc tre trf trr trs trt tsa tsb tsc tse tsf tsr tss tst tta ttb ttc tte ttf ttr tts ttt

-ase a-be aaaa aaab aaac aaae aaaf aaar aaas aaba aabb aabc aabt aaca aacb aacc aace aacf aacr aacs aact aaea aaec aaes aafa aafb aafc aaff aara aarc aare aars aart aasa aasc aase aasf aass aast aata aatc aatf aatt abaa abab abac abae abaf abar abas abat abb- abba abbb abbe abbr abbs abbt abca abcb abcc abcf abcr abcs abct abec abee aber abes abet abff abra abrc abrs abs- absa abse absf abss abta abts ac-t acaa acab acac acae acar acas acat acba acca accc acce accf accs acct ace- acea acec acer aces acet acfc acfe acfs acft acr- acra acrc acre acrr acrs acsa acsc acse acss acst acta actc acte actf acts actt aeac aeaf aeas aebs aecb aect aeer aer- aera aerc aers aesc aess aest aeta aetc aetf aetr aett afaa afar afat afbs afca afcb afcc afcs afee afer afes afet affa affc affs afft afr- afra afrc afre afrs afsa afsb afsc afst afta aftc afte afts arab arac arae araf arar aras arat arba arbe arbs arc- arca arce arcs arct area arec aree aref ares aret arfa arfb arfc arff arfs arft arr- arra arrc arre arrr arrs arrt ars- arsa arsc arse arst arta artc arte artr arts asaa asab asac asae asaf asar asas asat asba asc- asca ascb ascc asce ascr asct asea asec asee aser ases aset asfa asra asrc asrs assa assc asse assr asss asst asta astb astc aste astr asts at-t ataa atab atac atae atar atas atat atbs atca atcc atcf atcr atcs atea atec atee atef ater ates atfb atfc atfe atfs atra atrc atre atsb atsc atse atst atta atte attr atts baaa baaf baar baas baat baba babb babe babr babs bac- baca bacc bace bacs bact baer baes bafc baff baft bar- bara barb barc bare barf barr bars bart basa basc base basf bass bast bata batc bate batf bats batt bbas bbbb bbbs bbeb bbet bbfc bbrc bcaa bcar bcas bcat bcbc bcbs bcca bccc bccs bcec bcer bces bcet bcfc bcra bcrs bcsa bcsc bcss bctc bcts beaf bear beas beat beba bebb bebe beca becs beeb beef beer bees beet befa befe beff beft bera berc bere berr bers bert bes- besa bese bess best beta betc bete bets bett bfas bfca bfcs bffs bfsr bfta bfts bftt brab brac brae braf bras brat brca brcb brce brea breb brec bree bref brer bres bret brfc brrr brrs brsb brsr brst brtc bsaa bsac bsas bsat bscs bsea bseb bsec bsee bser bses bset bsfa bsfc bsff bsfs bsra bssc bsse bsts btaa btaf btcc btcs btec btfc btrc btrt btss bttb caaa caab caac caaf caas caat caba cabe cabf cabs cac- caca cacc cace